Correct Answer: Patna
Subject: 2025
Explanation: <b>Key Fact</b><br>The climate change radio and roadcast initiative was launched in Patna by environmental and media organizations to spread awareness about global warming and air pollution.<br><br><b>Additional Info</b><br>Topic: Environment & Climate Change in Bihar.<br><br><b>Why the other options are wrong</b><br>Option A: Correct.<br>Options B, C, and D were not the primary host city.<br><br><b>Exam Trick</b><br>State-level environmental media launches in Bihar almost invariably begin in Patna.<br><br><b>Final Answer</b><br>Option A — Patna.